TREASURY STOCK (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	May 31, 2012	May 31, 2011
Accelerated Share Repurchases Outstanding Common Stock		$ 200.0
Common Shares Purchased (in Shares)		5,199,699
Common Shares Purchase Price Per Share (in Dollars per share)		$ 30.00
Purchase Of Common Stock Value Excluding Related Fees and Expenses		156.0
Stock Repurchase Program Number Of Shares Repurchased (in Shares)	500,000
Stock Repurchase Program Repurchased Amount	$ 13.1
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 27.48